However, the most commonly used form of emissivity is the hemispherical total emissivity, which considers emissions as totaled over all wavelengths, directions...

Look up emission in Wiktionary, the free dictionary. Emission may refer to: Emission of air pollutants, notably: Flue gas, gas exiting to the atmosphere...

Low emissivity (low e or low thermal emissivity) refers to a surface condition that emits low levels of radiant thermal (heat) energy. All materials absorb...

A zero emission engine, motor, process, or other energy source emits no waste products that pollute the environment or disrupt the climate. Vehicles and...

The ratio of any body's emission relative to that of a black body is the body's emissivity, so a black body has an emissivity of one. Absorptivity, reflectivity...

Emission standards are the legal requirements governing air pollutants released into the atmosphere. Emission standards set quantitative limits on the...

ratio of the actual emission to the maximum theoretical emission is an object's emissivity. Each material has a different emissivity which may vary by temperature...

emissivity—of black-body energy levels. By definition, a black body in thermal equilibrium has an emissivity ε = 1. A source with a lower emissivity,...

Emissions control may refer to: EMCON, military state of minimal radio emissions Technology involved in vehicle emissions control Regulation of air pollution...

\varepsilon } is the emissivity of the surface emitting the radiation. The emissivity is generally between zero and one. An emissivity of one corresponds...

In radio communication, a spurious emission is any component of a radiated radio frequency signal the complete suppression of which would not impair the...

while having an emissivity of 0.93. This is because the absorptivity is averaged with weighting for the solar spectrum, while the emissivity is weighted for...

The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to electrons making...

stimulated emission of electromagnetic radiation. The word laser originated as an acronym for light amplification by stimulated emission of radiation...

Increasing methane emissions are a major contributor to the rising concentration of greenhouse gases in Earth's atmosphere, and are responsible for up...

An otoacoustic emission (OAE) is a sound that is generated from within the inner ear. Having been predicted by Austrian astrophysicist Thomas Gold in 1948...

temperature when the body's emissivity curve (as a function of wavelength) is not known. When the star's or planet's net emissivity in the relevant wavelength...

Emission theory may refer to: Emission theory (relativity), a former competing theory for the special theory of relativity Emission theory (vision), a...

Emissions trading is a market-oriented approach to controlling pollution by providing economic incentives for reducing the emissions of pollutants. The...

An emission nebula is a nebula formed of ionized gases that emit light of various wavelengths. The most common source of ionization is high-energy ultraviolet...

Emission channeling is an experimental technique for identifying the position of short-lived radioactive atoms in the lattice of a single crystal. When...

ejaculation (nocturnal emission) and orgasm for a male, and vaginal lubrication and/or orgasm for a female. Nocturnal emissions can happen after stressful...

Greenhouse gas (GHG) emissions from human activities intensify the greenhouse effect. This contributes to climate change. Carbon dioxide (CO2), from burning...

Proton emission (also known as proton radioactivity) is a rare type of radioactive decay in which a proton is ejected from a nucleus. Proton emission can...

electron emission specifically refers to emission of electrons and occurs when thermal energy overcomes the material's work function. After emission, an opposite...

Positron emission, beta plus decay, or β+ decay is a subtype of radioactive decay called beta decay, in which a proton inside a radionuclide nucleus is...

ideal emission would be. The emissivity of a material specifies how well a real body radiates energy as compared with a black body. This emissivity depends...

composition, thermal emissivity, and gravity fields. Onboard the spacecraft will be two scientific instruments, the Venus Emissivity Mapper (VEM) and Venus...

reflective surfaces have lower emissivity than non-reflective surfaces.[citation needed] Some sensors have an adjustable emissivity setting, which can be set...

In particle physics, secondary emission is a phenomenon where primary incident particles of sufficient energy, when hitting a surface or passing through...